Ignition means for internal-combustion engines.



M. B. GRIST. IGNITIMPMEANS FOB INTERNAL COMBUSTION ENGINES.

APPLIUATION FILED FEB.15, 1906.

Patented N0v. 15,1910.

ATTORNEY UNITE MARK B. cnrs'r, or rrrrsnoae,"PENNSYLVANIA, AssreNoa 'ro THE WESTINGHOUSE MACHINE COMPANY, A CORPORATION .OF PENNSYLVANIA- IGNITION MEANS FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent. Patented Nov. 15, 1910.

Application filed February 15, 1906. Serial No. 301.,228.

; To all whom/it may concern:

- Be it known that I, MARK B. (later, a

citizen of the United States, and a resident of Pittsburg, in the county of Allegheny and State of Pennsylvania, have made a new and useful Invention in Ignition Means for Internal-Combustion Engines, of which the' following is a specification.

- This invention relates to internal combustion engines and more nition means therefor.

The object of this invention is the production of a simple and effective apparatus to be used in connection with internal combustion engine jump spark devices. This and other objects I attain in an apparatus embodyin the features herein described and illustrate In the single sheet of drawing accompanying this application and forming a part thereof, Fwure 1 is -.a sectional elevation along the lme A A'of' Fig. 2, illustrating an apparatus embodying my invention. Fig. 2 is an end'view of the device shown in Fig. l in connection with a portion of a cylinder of-an internal combustion engine.

An ignition chamber 3 is formed within the head portion f an engine cylinder particularly to igand is-connected with the interior of the cylinder. or. yvorking or combustion chamber b a firing tube 5 in which is arran ed a high voltage jump-spark or i ition p ug 6. The plu 6 is mounted on a (iii cular disk or carrier -which is provided with two or more tapped holes 8, adapted to receive spark plugs 6. The disk? is pivotally .mounted and is capable of turning about a central stud bolt 9 which is secured to the head portion of the cylinder, and which is so arranged that any one of the holes 8 may be caused to register with an aperture 24 in the cylinder wall which communicates with the firing tube 5.. With such anarrangement a new vplu may be set, over the aperture and be broug t into communication with the ignition chamber through the firing tube without stopping the engine. The disk or carrier 7 is held securely in lace by a special'nut 10 secured to the stud olt 9 and by a clamp 11, which is held in place by the stud bolt and nut 12.

- The nut 10 is provided with an upwardly extending finger 13 to which is clam ed a fiber terminal-block 14. The terminallock is secured by a screw 15 to a clamp 16 which is mounted on the finger 13.. The terminalplug is provided-with a high voltageterminal 17 to which a wire 18, leading from a secondary coil or some other source of high voltage, is connected. The metal frame of the engine is connected to the other lead of the high voltage source and therefore forms a terminal in he high voltage circuit. The arrangement is such that in causing a spark to'jump across the plug gap the high voltage current must also ump across a gap 20 between the terminal 17 andthe head portion 19 of theigniter plug.

The current producing-theignition spark is led from the high vcttage generator through the lead 18, into the terminal 17, across the gap 20, and into the plug. Under these conditions the operator can readil see by noting the spark at the gap -20 i the high voltage current is jumping properly in the igniter plug and since the hi h volt-a e terminalv is secured to the nut 10w h holds the disk 7 in place, a sparkcannotjump across the terminals of the ignition plug while the cover 7 is loose, nor can a premature explosion occur in the en ine during the operation of changing the p u because with an appreciable widening o the gap QOthe igh Volta e curr'ent'will start to jump across a saety gap which must be provided in the circuit and the ignition plug and its connections are then exterior to the high voltage circuit.

A passage 21 connects the firing tube 5 with the atmosphere and is connected to a pipe 22 which is providedwith a cock 23 adapted to close or open the passage. 'By

opening the cook 23 the compression or combustion in the cylinder will cause a blast to pass over the terminals of the igniter plug which will remove anymoisture or soot tending to impede or hinder the sparking.

- -The passage 5 is of suflicient cross seccarrieris rotatable,

shape and may be independent of the head portion of the engine cylinder and various means may be utilized for mounting the disk 7 and changing the ignition plugs.

Having described my invention what I claim as new and useful and desire to secure vby Letters Patent is;

1. In combination with an internal combustion engine, a spark plug mounting disk provided with a plurality of openings adapted to receive spark plugs and means for locking said disk in difierent positions, said means carrying a terminal support for said igniter lugs.

2. In iigh voltage ignition apparatus for internal combustion engines, a spark plug, a mounting disk for said spark plug, a looking means for said disk and a terminal sup- 1 electric c1rcu1t.

port for said ignition apparatus carried by the locking means.

3. In combination with acylinder of an internal combustion engine, an ignition systern, a plurality of spark plugs, a movable mounting member forsaid plugs, and locking means for said member, carrying a .terminal in said ignition apparatus.

4. In combination with an internal combustion engine, an ignition chamber, a cylinder,-a firing tube connecting said ignition chamber and cylinder, a movably mounted carrier provided with holes for two or more spark plugs, two or more spark plugs mounted in said carrier, an aperture provided in said cylinder walls and placed so as to suecessively communicate with each of said spark plugs as said movable carrier is rotated, a pivot stud about which said movable a lock nut for said carrier on said pivotstud, provided with a cylindrical top, and a terminal for said spark plug secured bynon-conducting material to said lock nut in such a position that when said movable carrier is locked the terminal closes the electric circuit of said spark plug and when said carrier isreleased by said Jock nut said terminal is moved to break the electric circuit.

5. In combination with an internal combustion engine, an ignition chamber, a cylinder, a firing tube connecting said ignition chamber and cylinder, a movably mounted carrier with holes for two or more spark plugs, two or more spark plugs mounted in said carrier, an aperture provided in said cylinder walls and located so as to successively communicate with each of said spark plugs as said movable carrier is rotated, a

pivot stud about which said movable carrier is rotatable, a lock nut for said carrier, and a terminal for said spark plug secured to said lock nut' in such a position that when said movable carrier is locked the terminal closes the electric circuit of said spark plug and when said carrier isreleased by said lock nut said terminal is :moved to break the 6. In combination with an internal combustion engine, an ,1gmt10n chamber, a cylinder, a firing tube connecting said ignitionv chamber and said cylinder, a movablyruary, 1906. v

MARK B. CRIST. \Vitnesses:

CHARLES W. McGrmE, E. NV. MCCALLISTER. 

